Speaker
Description
The study of hypernuclei and their production mechanisms open new opportunities for nuclear/particle physics and astrophysics. The hyperons influence many nuclear properties in finite nuclei and in neutron stars (infinite nuclear matter). We review the main processes leading to the production of hypernuclei in nuclear reactions including relativistic ion collisions. Such deep-inelastic high-energy interactions do lead to fragmentation and multifragmentation of nuclear matter, and hyper-fragments can be abundantly produced [1,2]. The binding energies of hyperons influence the hypernuclei formation [3,4] and this gives a chance to evaluate experimentally the hyperon effects in nuclear matter. The most promising process for such a hypernuclear research is a disintegration of large excited hyper-nuclear residues produced in peripheral relativistic nucleus-nucleus collisions. Besides, there is a coalescence-like mechanism responsible for combining hyperons and other baryons into light clusters. The primary coalescent nuclear clusters can be formed at the subnuclear densities and be excited. Their subsequent decay is able to explain new phenomena observed in central heavy-ion collisions. Also this process can be used to get information on unstable hypernuclear states. We use the transport, coalescence and statistical models to describe the whole process, and demonstrate the important regularities of the hypernuclei formation and the advantages of such reactions over the traditional hypernuclear methods: A broad distribution of predicted hypernuclei in masses and isospin allows for investigating properties of exotic hypernuclei. We point at the abundant production of multi-strange nuclei that will give an access to multi-hyperon systems and strange nuclear matter. The realistic estimates of hypernuclei yields in various collisions are presented.
[1] A.S. Botvina, et al., Phys. Rev. C95, 014902 (2017).
[2] A.S. Botvina, et al., Phys. Rev. C94, 054615 (2016).
[3] N. Buyukcizmeci, et al., Phys. Rev. C98, 064603 (2018).
[4] N. Buyukcizmeci, et al., Eur. Phys. J. A56, 210 (2020).
